Refrigerating apparatus



June 17, 1930. F. E. DENNlsoN 1,763,923-

REFRIGERATING APPARATUS Filed July 26, 1928 Patented June 17,` 19930 UNITED STATES PATENT oFF'lcE FRENCH E. DENNISON, OF BELOIT, WISCONSIN, ASSIGNOIEI'l TO NATIONAL l.EFR'IGERAV TION CORPORATION, OF,BELOIT, WISCONSIN, YA CORPORATION OF DELAWARE BEERIGERATING APPARATUS Application led .l'uly 26,

mum of heat vtrans erence 'may be obtained between the compressed refrigerant and the' cooling fluid therefor, with a minimum oi loss Aby radiation.

The primary object of this invention is accordingly to provide a refrigerating apparatus -which has a large refrigerative capacity while occupying a minimumvof space. Another object of this invention is to provide a refrigerating apparatus in which a maximum of heat transferenee takes place between the compressed refrigerant and the cooling fluid.

Another object of 'this invention is to provide a'refrigerating apparatus having a condenser for the refrigerant 'which'.is readilyaccessible for inspection, renewal'and repair. v y A further object of this invention is to -provide a refrigerating apparatus', in which the cooling water is circulated in proximity` to the condenser at a rate of flow which will f be unfavorable to the depositing of sediment and scale.

Other and further objects of this invention will be apparent as the same becomes better understood from 'anjexamination ofv the specification and claims in connection with the accompanying drawing wherein is v shown a refrigerating apparatus embodying this invention. l 4

Referring to the drawing more i particularly, reference character 1 designates a horizontally elongated hollow casting open at. one end which forms a base vfor the apparatus and a housing for the condenser and re- -frigerant receiver, as will be hereinafterv explained.

The casting 1 is rovided with integral legs 2 at its'lower si e and at its upper side with integral raised supports Bvfor a motor 4, integral raised supports 5 for a control box 6 for the motor 4;, and integral -raised supports 7 for a compressor 8 connected to said motor.

192s.v4 serial No. $295,424.

12 extending inwardly from the wall of the casting 1.

One end 13 of the coil 9 extends coaxially of the coil and casting 1v through asuitable aperture -14' located centrally of the closed cnd 15 of said casting, said' closed casting end being provided wlth a gland 16 surrounding said coil end for sealing said closed end at said aperture. The end 13 is detachably coupled to the delivery end of a valve v17. This valve 17 is connected at .its intake by means of'a pipe connection 18 to the discharge of the compressor 8. .The opposite end 19 of the coil 9 extends .through a central aperture- 21 in a removable closure plate lor head 22 removably bolted to the open end of the casting 1. -The head 22 is provided with a gland 23 surrounding the end 19 of the coil for sealing the head at the aperture 21. The end 19 of the coil is detachably coupled to an elbow 20 leading to a valve 24. The valve 24 is supported, by `and is adapted to deliver refrigerant through a pipe 25 which extends back through the head 22 v v.

. A cylindrical casing`26 closed at one end is fused at its open end to the 4interior of y the head 22, and v is/adapted to receive compressed and cooled refrigerant from the pipe 25. This casing 26 to' ether with the inner face of the head 22 fgorms the refrigerant receiver and extends longitudinally of thecasting 1 through vthe coil 9. The outer pepelled to Aflow substantially within the culating water being thus conned to the groove 11 will develop considerable velocity vand will not onlyprevent the accumulation of sediment and scale on the outer walls'of the coil, but since it travels in close proximity to the coils and against the direction of the flow Within said coils, it will cause a maximum of heat transference between therefrigerant within the coils and the water.

The refrigerant receiver being at all times within the casting l in contact with the cooling Water, a further cooling of the compressed refrigerant may be obtained after the same is admitted to the receiver, and `in addition, vthe apparatus is rendered more compact, requiring a minimum of space.

The head 22 is also provided with a fitting 29, including a suitable valve in communication with the interior of the refrigerant receiver and adapted to deliver the refrigerant to the evaporator (not shown). After the refrigerant has been .used in the evaporator it is returned to the compressor through pipe 30.

By merely removing the coupling (not shown) by means of which the fitting 29 is connected to the evaporator line, detaching gaged with said housing.

the coupling connecting the end 13 of the condensing coil with the valve 17, removing the connection to the circulating supply line, and removing the head bolts, said coil and the refrigerant receiver may bescrewed out for inspection, renewal or re air as'a unit. By' merely uncoupling the tting 29 from the evaporator line, the pipe 27 from the circulating water line and the end 19 of the coil from the elbow 20 and removing the head bolts vtherefrigerant receiver may be withdrawn horizontally from said casting 1. l The coil 9 may then be screwed out alone.

In assembly, the coil 9 is introduced into the casting l from the open endl thereof and is advanced horizontally to its position by lthreading it into the helical groove l1. The advantages as to compactness and efficiency of heat transference with a minimum ofloss by radiation and the operation of the apparatus will be apparent from the foregoing without further description.

I am aware that many changes may be made without departing from the principles of this invention and I therefore do not wish to be limited to the 'details shown ordescribed.

I claim:

l. In a refrigerating apparatus, the' co'mbination of a housing, and a condensing coil the convolutions of which are threadedly en- 2. In a refrigerating apparatus, the comi bination of a housing, and a condensing coil removably connected with the housing, the

convolutions of the coil being in threaded engagement therewith. I

3. In a refrigerating apparatus, the combination ofl a housing provided with a circulating chamber, a condensing coil disposed in saidchamber, means for circulating cooling fluid through said chamber lon tudinally of the coil including channels or along the individual convolutions of the coil in close proximity thereto and a refrigerant receiver connected to the discharge end of the coil with its-walls forming part of the walls of said channel.

4. In'a refrigerating apparatus, the combination of a generally cylindrical hollow housing, a helical condensing coil disposed in said housing with its convolutions in -causing substantially all of the fluid to flow proximity to the walls of said housing, the

latter being provided with a groove to receive the convolutions of the coil, and a member presenting a cylindrical surface cooperating with said groove to form therewith a helical passage for the circulating fiuid and to enclose the convolutions of said coil.

5. In a refrigerating apparatus, the combination of a generally cylindrical hollow housing, a helical "condensing coil disposed in said housing with its convolutions in proximity to the walls of the housing, the latter being provided with a groove to receive the convolutions. of the coil, and a refrigerant receiver presenting a cylindrical surface cooperating with said groove to form' 'therewith a helical passage for the circulating 'fluid and to enclose the convolutions of said coil.

6.y In a refrigerating apparatus, the com'- bination of a housing, a condensing coil'the convolutions of which are threadedly engaged with said housing, and a refrigerant receiver-surrounded by said coil.

7. In a refrigerating apparatus, the combination of a housing having a helical groove on its interior surface, a helical condensing coil with its convolutions ydisposed'in said groove, and a cylindrical membery disposed inside of said coil forming with said groove a helical channel surrounding the convolugroove on its interior surface, a elical condensing coil the convolutions of which-are. disposed in said 'groove and which is removable therefrom by an unscrewing movement,

and a cylindrical member disposed inside of said coil forming with said groove a helical channel surrounding the convolutions of the coil, and connections for circulating a coolingv fluid through said channel.

In witness of theforegoing I aiiix my sig- 'i` FRENCH E. DENNI'soN.

nature. 

